Hi Jacqui and welcome to planDisney!
One of my favorite things about
MagicBands (besides what you can do with them) is that there are so many different designs and colors to choose from. I have grown quite a collection and change them out depending on my mood or outfit for the day. The "Be Happy" one is a favorite of my daughter's because it's bright and cheerful and always reminds her to have a great day when she wears it.
I do see that the "Be Happy" MagicBand+ is not available for pre-arrival purchase for
Disney Resort Guests at this time. Inventory is always changing, so it's possible it will be there one day and be gone the next. This one has been out for quite some time, so it might not make it back in circulation online, so you could have a better chance of finding it in person at one of the Walt Disney World shops.
Emporium on Main Street U.S.A. in
Magic Kingdom Park always has a decent selection as well as the
Frontier Trading Post in Frontierland. Another great place to look is at
D-Tech on Demand in the Marketplace Co-Op in
Disney Springs. You can use MagicBand On Demand to custom create a MagicBand just for you.
Keep checking the available inventory daily just in case the "Be Happy" MagicBand+ pops up for your upcoming vacation. Please
stop back by and visit if you have any additional vacation planning questions.
Have a magical day!
Leslie